There's actually a Sashiko stitch in the 12000. Touch the Applications key (T-shirt), then Quilting, then Sculpture and it's the third one on that screen. You'll use the AD dual feed foot, as called for on the screen, with your regular thread in needle and bobbin. You can also achieve a hand-stitched look using one of the stitches in the Hand Look section of the Quilting application. Those use monofilament in the needle and quilting thread on the bobbin.